【机器学习】7 Linear regression7 Linear regression 217 7.1 Introduction 217 7.2 Model specification 217 7.3 Maximum likelihood estimation (least squares) 217 7.3.1 Derivation of the MLE 219 7.3.2 Geometric interpretation 220 7.3.3 Convexity 221 7.4 Robust linear regression * 223 7.5 Ri